It dawned on me one day that in the old time movies, the bad guys will go off and play a sinister tune on the organ in their haunted house or lair. Just like in The Ghost and Mr. Chicken
The Phantom of the Opera (although he isn’t really a bad guy in this story, but still creepy)
Pirates of the Caribean, Dead Man’s Chest (Davy Jones who is creepier still)
Just remember, not all organists are sinister. Just to be clear, I am a non-sinister organist.